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Letters Pate'ntNo. 74,5342', dated February 18, 18'68.

4:muove new 1N. LAMPS,

ttlge tlgehule nient-tt tu than Enten tteut mit nzitiugnart ni tige stmt.

:no ALL wnoM Ir MAY' CONCERN.:

' 'Be it known that I, JOHN INGRSOLL, of Cleveland', in the vcounty of Cuyahoga', and State-of'-0hio, have invented certainl new band useful Improvements iniLamps; and I do hereby declare that the following isa full and complete description of the same, reference b ei'ng hed to the accompanying. drawings, making a part of this. specification, 'in which- `Figure 1 is u perspective. view f the lamp. v"Figures '2 and 3' arevertical' transverse se'ctions. .V The other gures are detached sections, to which referenceV will "b'e'had, Like letters of reference refer to likep'rts in the several views. 1 v I v A, g. 1,' represents, the base or pedestal of the lamp, and B the standard, to which the globe or oil-chamber C is attached, all of. which is or muy be constructed in the'Y ordinary'wa'y and of such material commonly used in themanufactnre of lamps.' Descending from the bottom of the'fglobe is a tnbe,'D, Eg', 2, closed at the end and ittved to thefsoclgett'o-f the' standard, wherebyl the globe issup'port'ed and connected to the base. Descending from the underside of the top of the -glob'e is a tube, E,'.of su-iiic'ient length toreach through the globe, 'thence to the bottom of the tube D, This tube E has a. plain, smooth surface down to the point zr, Where it entersthe ytube D; thence `downward it is'corrugated, as shown in the transverse ,supplementary figure Al'. Fig: 3 is a modification .of' lig. 2, the,(inference-.consisting simply in corrug'atiu'g the outer tube D, instead of .the inner' one E, and 'continuing the plain, smooth surface of the'inn'orti'lbe to the' bottom, as indicated by the transverselsupplementaryfigure B. Figure 4 is' also a modified construction of the'snnie",in`fwhicl1 it will be seen that f bo'th tubes are plainand smooth throughout, the tube EVbein-g kept'fromcotac't with the outer tube4 or shank D, by the lugs or points F, at the'top, and the outward curved'points--Gt thesbqttom. 'The respective relation ofthe two is `shown inthe transverse supplementary iigure C. .'I'tJwIl -be'obviois that in these various con structions the object to be'obtained isa space between the. two tubes,` the 'purpose of which w'illpresentlyv vbe'shw' y f Having ,thus described the construction and-,arrangement'of'the several par't's of the lamp, the practical operation of thessme is as follows: The lampfis Aprovided with anordinary-cup-burner und wick, tho latter passing down inthe tube to 'near th'e'bott'om,` The lamp 'is lled by pouring the oil into 'the tubefrom the top, which ows'out-from the bottom through 'the openings a at- 'tlelowerend of 'the tube, thence upward' into the' `globe, as indicated-by the arrowst Y l v 3 It is'well known that oillamps,jns'ordinarily mode, nre veryliabl'e t'o explode in r'co'nsequenceof a large accumulation of Vgas between the oil'and the base ofthe burnerwhiclr, oncoming in Acontact with the ame, guites, and bursts' the'la'mp with great 'violence and imminent danger of li'fe.fV A lamp constructed es' above described cannot explode, for.the |reason' that the oil is supplied tothe wick 'only through the tubev in which it is placed, thelargesurface'of'the oil'in the'globc being shut of froi'nthewicli bythe t'u'be soldered to the base of the burner, or rather the collar into which the burner is screwed hence but a "very small amountof gas can Aaccumulate about the base of the burner, which 'is taken uphy. the saturated wick and' burned. The gas that naturally accumulates above the oil in the'globe, and which 'li-n the lighter oils -i'squite large, is conducted ou't from the' globe to thevburnei` through the small gas-tube J,"gs. 1 and 3;,an1d is then consumed along with the oilcarried up by th'e wick, 4therr'aby' increasing the intensity` of the light without the least danger of explosion. 4liven should the lia'me'reach the end of the tube,- itwouldnotrun back in the tube und ignite 'the gas vin the globe, but burn at the end in perfect safety. VVThe' lighter "or moro volatile parts-of the oil, on standing in""`the lamp, ascends to 'the top,and that of thelheavier'gravity, which' is 'the least combustblepfalls to the bottom; hence, if the oil is burned from' the top,'its consumption is-much more rapid and with an increase of lightrthan it' burned from'the `bottom-;thoret"ore, a uniform volume of-lght'is not obtained'from all the oil consumed, but 'by burning the oil from belw,as this lamp isde'signed todo, a greater uniformity in the intensity of the light isv obtainedibythe consumption off the moet volatile parts ol' oil along with'theheavy, it being supplied'to .the burner, as shove' said, by tlie'small tube J." Another advontage'of this lamp' consists in-'its entire safety while boing carriedaboutinithehand.A As tholarge bodyof- Vthe oil vis shut'oiltrom the burner, it cannots'w'as'h up up into the burner.

about the-base of the plane, as is the case of 'the common lamp, which, in consequence, often enplotes'by the ignition of theVoil-in actual contact with the flame, or from the in creae of gas caused bythe agitation ascending What I claim .as my improvemenand desire to secure .by Letters `1:atent, is1 y Extending the tube E from the top of the lamp down into the hollow stem or shank D, and so arranged,

*Y in relation to each othe and the globe of the lamp, as to form apassageforthe oiLbetween the said tu'be and shank infllling and in burning, s nbstantially assetforth. l 1

' l JOHN INGERSOLL.

Witnesses:

Wt'H. Boulbon,

J. HOLMES. 

